PHYSICS HIGH SCHOOL

White light is shining on a green grape. The grape _____.absorbs green light
reflects green light
reflects all colors of light except green
transmits green light

Answers

Answer 1
Answer: The grape absorbs all colors except green, and green light is the
only light that remains to bounce around and enter people's eyes. 

This is a big part of the reason why, whenever somebody looks at
the grape, they remark "Oh look !  The grape is green !"
Answer 2
Answer:

Answer:

reflects green light.

Explanation:

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The body can get water from milk juice and vegetables

A shorter electromagnetic wave is _____.more powerful
less powerful
hotter
colder

Answers

A shorter electromagnetic wave is hotter.
A shorter electromagnetic wave produce heat hotter than ultraviolet rays. Because it produces both gamma rays and ultraviolet rays that makes it hotter that the heat of the sun.

the answer is more powerful or A

A car tire is fully inflated to a pressure of 32 psi at 25 °C. After driving for 2 hours, the volume of the tire is unchanged, but pressure of the tire is now 36 psi. What is the new temperature of the gas inside the tire?What caused this change?

Answers

Answer:

50.5°C

Explanation:

Start with the ideal gas law:

PV = nRT

Rearranging:

P/T = nR/V

Since the right side is constant (volume and mass don't change):

P₁ / T₁ = P₂ / T₂

This equation is also known as Gay-Lussac's law. Plugging in the values (make sure to use absolute pressure and temperature):

(32 psi + 14.7 psi) / (25 + 273.15) K = (36 psi + 14.7 psi) / T

Solving for T:

T = 323.69 K

T = 50.5°C

The amount of matter in a substance or object is called:
??? What the answer

Answers

Answer:

mass!!

Explanation:

What is the main difference between primary and secondary succession?A The climax of primary succession is pine forest
B Primary succession begins with bare rocks
C Secondary succession begins with mossed and lichens
D Secondary succession include frequent fires

Answers

Answer:

b

Explanation:

The amount of heat neededto raise 2.0 kg of a substance by 80 K is 33 kJ. What is the specific heat of
the substance?

Answers

Q = mcθ
 
Where Q = Amount of heat in J
             m = Mass of substance in kg
              θ  = Temperature rise in °C or K
              C = Specific heat capacity in J/kgK

From given data:
Q = 33 kJ = 33 000 J, m= 2.0 kg,   θ  = 80 K,   c = ?

33000 =  2 * c * 80
33000 = 160c
160c   = 33000
       c   =  33000/160 = 206.25

Therefore specific heat capacity is 206.25 J/kgK

The vapor pressure of ethanol is 1.00 × 102 mmHg at 34.90°C. What is its vapor pressure at 60.61°C? (ΔHvap for ethanol is 39.3 kJ/mol.) mmHg

Answers

Answer:

The vapor pressure of ethanol at 60.61 °C is 327.56 mmHg

Explanation:

using Clausius-Clapeyron equation

ln((P_2)/(P_1)) = (\delta H)/(R)((1)/(T_1) -(1)/(T_2))

where;

ΔH is the enthalpy of vaporization of ethanol = 39.3 kJ/mol

R is ideal gas constant = 8.314 J/mol.K

P₁ is the initial pressure of ethanol at T₁ =  1.00 × 10² mmHg

P₂ is the final pressure of ethanol at T₂ = ?

T₁ is the initial temperature = 34.9°C = 307.9 K

T₂ is the final temperature = 60.61°C = 333.61 K

ln((P_2)/(P_1)) = (\delta H)/(R)((1)/(T_1) -(1)/(T_2)) \n\nln((P_2)/(100)) = (39300)/(8.314)((1)/(307.9) -(1)/(333.61))\n\nln((P_2)/(100)) = 4726.9666 (0.003248 -0.002997)\n\nln((P_2)/(100)) = 4726.9666 (0.000251) = 1.1865\n\n((P_2)/(100)) = e^((1.1865)) \n\n((P_2)/(100)) = 3.2756\n\nP_2 = (100*3.2756)mmHg\n\nP_2 = 327.56 mmHg

Therefore, the vapor pressure of ethanol at 60.61 °C is 327.56 mmHg
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